摘要
毂帽鳍作为一种新型的船用节能装置,合理地安排其在桨后的位置,能明显提升螺旋桨的推进效率,因此,有必要对毂帽鳍的节能效果进行研究。采用计算流体动力学方法,对毂帽鳍的敞水性能进行模拟。通过改变鳍叶在桨后的各个参数,分析其尾流的变化,以及各重要剖面处的压力分布等情况。模拟结果表明:鳍叶的不同安装角位置对桨的效率变化有明显的影响,而轴向位置的改变则对其效率的提高影响不大。通过观察尾流分布及压力分布图,可以直观地看出鳍叶的主要功效是产生与螺旋桨转向相同的扭矩,同时使尾流速度降低从而削弱乃至消除毂涡。
As a novel marine energy-saving device,the Propeller Boss Cap Fins（PBCF）is often properlyinstalled behind the propeller to boost the propulsion efficiency of the propeller. As a result,the researchon the energy-saving effects of PBCF is of vital importance. In this paper,a computational fluid dynamicssoftware is adopted to simulate the open water performance of the fins. By changing the various parametersof the fins on the back of the propeller,the corresponding changes of wakes,the pressure distribution atcritical sections and other performance factors are analyzed. The results show that the different fix angles offins significantly impact the propulsion efficiency,while the change of axial positions produces little effect.Also,by observing the diagrams of wake distribution and pressure distribution,it could be concluded thatthe major function of fins is to produce certain torque on the same direction as the propeller and to reducewake speed so that the hub vortex may be weakened or even eliminated.
出处
《中国舰船研究》
2014年第1期59-65,80,共8页
Chinese Journal of Ship Research
基金
国家自然科学基金资助项目(51209034)
国家公益性行业科研专项:渔业节能关键技术研究与重大装备开发项目(201003024)
关键词
螺旋桨
毂帽鳍
计算流体动力学
节能效率
propeller
propeller boss cap fins
computational fluid dynamics
energy-saving effect
